Earnings Per Share - Schedule of Computation of Earnings Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Net Income, Basic Earnings Per Share: Income available to common shareholders	$ 502us-gaap_NetIncomeLoss	$ 729us-gaap_NetIncomeLoss
Net Income, Diluted Earnings Per Share: Income available to common shareholders and assumed conversions	$ 502	$ 729
Weighted Average Shares, Basic Earnings Per Share: Income available to common shareholders	3,021,163	2,990,752
Weighted Average Shares, Effect of dilutive stock options	15,269	3,823
Weighted Average Shares, Diluted Earnings Per Share: Income available to common shareholders and assumed conversions	3,036,432	2,994,575
Per Share Amount, Basic Earnings Per Share: Income available to common shareholders	$ 0.17us-gaap_EarningsPerShareBasic	$ 0.24us-gaap_EarningsPerShareBasic
Per Share Amount, Diluted Earnings Per Share: Income available to common shareholders and assumed conversions	$ 0.17us-gaap_EarningsPerShareDiluted	$ 0.24us-gaap_EarningsPerShareDiluted

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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- Definition

This element represents the weighted average total number of shares issued throughout the period including the first (beginning balance outstanding) and last (ending balance outstanding) day of the period before considering any reductions (for instance, shares held in treasury) to arrive at the weighted average number of shares outstanding. Weighted average relates to the portion of time within a reporting period that common shares have been issued and outstanding to the total time in that period. Such concept is used in determining the weighted average number of shares outstanding for purposes of calculating earnings per share (basic).

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